A: The most common side effects are: redness, tenderness, swelling, blistering, scabs, bruising, hyperpigmentation, hypopigmentation. All of these side effects are temporary. Redness, tenderness, and swelling typically subside within a day or two following treatment. Blisters usually appear within 24 hours of treatment; sometimes the blisters are very large and may look alarming – this is completely normal. Scabs, bruising, and blistering may take up to a week or longer to heal. Hyperpigmentation and hypopigmentation occur when the body’s production of melanin is skewed after a laser treatment. With hyperpigmentation, the body overproduces melanin in reaction to the laser treatment, so skin in the treated area is darker than the natural skin tone. With hypopigmentation, the melanin is depleted by the laser treatment and the skin appears bleached. Both hypopigmentation and hyperpigmentation are typically temporary and resolve naturally with time.